Like a charm. I've just tested Castlevania POR, and intros run fine without stutters, it detects my NORMAL Sandisk 1GB as 2x, but putting it at 3x worked fine, tested the intro of POR at both 2x and 3x speed and it runs fine. The MicroSD is formatted at FAT, not FAT32. Tried out other games and works just fine so far. No complains from me. Am using the 1.01 OS that was uploaded in the other thread. Haven't tried other functions like browser as I'm not sure if my old old old GBA flash cart can act as a RAM pack for it, or other homebrews, but so far all of the games that I've loaded have worked fine. AFAIK, these roms are clean and have not been patched in any way. I guess those having problems must have been unlucky, but this SupercardDS(One) is working like a sweet baby for me. Hope this helps those still deciding. edit: oddly enough: the DoS intro wasn't working. I must have thought something else was the intro (noob me). Anyway PoR intro runs fine without any adjustment to speed settings, only the DoS needs some work, otherwise everything else runs fine without any tweaking. Have tried Beup, but my wireless network isn't under my control at the moment ( cos i'm only staying at my current place for awhile. Will try it as I get more info.